You can get these in smaller packs at some places (maybe individually?)...
If 5g is too small you can also get it in 30g
There are quite a few very good 99-100% chocolates around, but I'm not aware of many that come in smaller than 50g blocks.
* That's if you aren't scared to get off the 85% and into some real chocolate!
The "Seven Deadly Sins"
• Grains (wheat/rice/oats etc) . . . . . • Dairy (milk/yogurt/butter/cheese etc) . . . . .• Nightshades (peppers/tomato/eggplant etc)
• Tubers (potato/arrowroot etc) . . . • Modernly palatable (cashews/olives etc) . . . • Refined foods (salt/sugars etc )
• Legumes (soy/beans/peas etc)